Anyways… enough with the Kim Possible and onto the NPCs!
NPC #1: Baymax
I found this when the “Buttoned Up” Mission of Ralph and Vanellope before leveling up to Level 3, Update 2.
Note that it says:
"BAYMAX offers some tape. HE uses it all the time for patchwork. Unfortunately, it’s not quite sturdy enough.
Duely noted XD wow though so now we have Baymax as well…!
NPC #2: Timon and Pumba
I found this when Nick and Yax’s Friendship was level 12, unlocking the Mission “Conspiracy Yax”, their conversation goes like this:
It says:
Yax: Hakuna matata, my friend!
Nick: Hakuna-ma-whata?
Yax: Oh, it’s a new expression I learned from a meerkat and a warthog. It means "no worries."
NPC #3: Cinderella’s Mice Friends
I found this when I fully leveled up the “Buttoned Up” Mission of Ralph and Vanellope to level 5.
The Update says:
“A group of mice tell Ralph that they can help, and sew the new button on. It’s perfect!”
It might be these group of mice from Cinderella:
NPC #4: Madame Armoire
Found this out when leveling up the “Fashion Plate” Mission of Elastigirl and Vanellope.
It says:
"After several unsuccessful store visits, Elastigirl decides to take Vanellope to MADAME ARMOIRE’S for some custom tailoring.
For those who don’t know who “Madame Armoire” is, she’s the cabinet in the film “The Beauty and the Beast.” Still don’t know her? Here’s a picture!
I actually just saw a character from finding dory in the background of a port lvl. I didn’t screenshot it cuz this stupid tablet doesn’t have that ability but it was in the last lvl of felix’s and frozone’s friend campaign number 6. You know the derpy faced seal in finding dory? Is his name gerald? any way he was there!
Edit:Gerald is also mentioned in the friendship campaign of dash and vanelope. Episode 4 chapter 4
I’ll edit this later… but Wasabi (Big Hero 6), is mentioned in the JJ-Bogo Campaign.
Dug from UP is mentioned in vanelope and dash’s friendship mission: homework thief! Again I can’t screen shot thanks to this tablet.
Edit: Russell is mentioned in the next section
The best thing about the Disney NPC idea, is that it doesn’t have to be limited to only characters mentioned in Friend Missions and Campaigns… though, it does make them likely candidates for sure!
With such a rich history and following as Disney, there’s so much potential for who or what we could see! Even if they seem to be digital copies of the originals… or are they originals to begin with?
The mystery continues~ 
I don’t handle mysteries very well…
I haven’t completed the Homework Thief Mission yet, so I don’t know what is the content/easter eggs there. But, I’ll look it up maybe sometime, I’ll screenshot as much as possible about the Friend Missions. 
NPC #5: Wasabi (Big Hero 6)
Found this out when leveling up the “Laser Focus” Mission of Jack-Jack and Vanellope
It says:
“Bogo goes to the university to ask Wasabi for help, but his laser hands are better for cutting glass than engraving it”
Aww! It would be so cute to see Timon and Pumba become a playable character. It would be cuter if they’re duo heroes (like sulley and the girl -what’s her name?-) and Timon is on Pumba’s back like in the movies.
Actually technically the girls name is mary! But sulley calls her boo
Also do yah the most recent and obvious one…Ursulas magic cauldron in the heist…do I need to elaborate?
I also saw a “Jumba’s Jukebox” in Chapter 7, does that help?
XD a what now?
(You know with this is here…)
There’s an easter egg… found in Chapter 7, 3rd wave. (Not sure what level though)
The easter egg is “Jumba’s Jukebox”
If you don’t know who he is, here’s a picture (sorry if it’s trash…)
I guess you could call him “Jumba JUKEeba”
Oh that guy! I know hi m! I saw him in lilo and stitch the movie! The only thing that I ever watched that was lilo and stitch related…I just realized something about stitch in game…WHY THE HECK DON’T ANY OF HIS SKILLS MAKE HIM DRESS UP AS ELVIS PRESLEY!!!
Ok so claw Hauser from zootopia (the leopard at the front desk in the police station) is mentioned in dash and vanelopes friendship campaign…last lvl of chapter six I believe.
